单项选择题

An undocumented vessel with 10 people aboard and operating 25 miles off the seacoast must carry a survival craft of the（）.

A.inflatable buoyant apparatus type
B.buoyant apparatus type
C.life float type
D.Any of the above types are acceptable

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单项选择题

An overtaking situation at night would be one in which one vessel sees which light(s) of a vessel ahead?（）

A.Masthead lights and sidelights
B.One sidelight，the masthead lights and stern light
C.Both sidelights
D.Stern light

单项选择题

An oiler was badly burned and you are communicating with a passenger ship that has a doctor and hospital on board. You want to rendezvous in a certain position so the oiler can be evacuated for medical treatment. Which code should your message contain?（）

A.MAF
B.MAB
C.MAA
D.MAE

单项选择题

An isotherm is（）.

A.a line on a weather map connecting equal points of both temperature and pressure
B.an instrument that measures the climatological effects of temperature
C.a line connecting points of equal barometric pressure on a weather map
D.a line connecting points of equal temperature on a weather map